Directory · Models · AI21

Jamba

Jamba 2

Name: Jamba 2
Brand: AI21
Price: 0.5 USD

Hybrid Mamba + Transformer architecture. Linear cost scaling on long contexts, so the 256K window is actually fast.

Input / 1M

$0.50

Output / 1M

$1.50

Context

256K

Released

Nov 14, 2025

Benchmark profile

Profile

MMLU-Pro75.5%

HumanEval77.0%

IFEval83.0%

TruthfulQA83.0%

HarmBench83.0%

LiveBench75.5%

Scores

Editorial

Strengths

+Linear-time long context
+Cheap long-doc RAG
+Open weights

Trade-offs

−Smaller ecosystem of fine-tunes

Price history (last 90 days)

History starts accumulating on the next nightly snapshot.

What this costs to use

All task cards →

Summarize a 1-hour meeting transcript
15,000 in · 500 out
$0.0083per task
Review a 500-line pull request
8,000 in · 2,000 out
$0.0070per task
Answer a customer support ticket
3,000 in · 800 out
$0.0027per task

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